/* 移动端body初始化 */
body {
    width: 100%;
    max-width: 640px;
    min-width: 320px;
    margin: 0 auto;
    font-size: 14px;
    font-family: -apple-system, Helvetica, sans-serif;
    color: #000;
    line-height: 1.5;
    background-color: #f2f2f2;
    overflow-x: hidden;
    height: 2000px;
    -webkit-tap-highlight-color: transparent;
}